Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 33, NWS Pittsburgh, PA

May 22, 2013Allegheny County, Beaver County, Washington County, Pennsylvania; Hancock County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at May 22, 2013, 5:57 PM EDT for Allegheny County, Beaver County, Washington County, Pennsylvania; Hancock County, West Virginia. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 22, 2013, 5:57 PM EDT (21:57 UTC)
Expired: May 22, 2013, 6:45 PM EDT
In force: 48 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Allegheny County, PA, Beaver County, PA, Washington County, PA, Hancock County, WV

The radar

The Pittsburgh radar (KPBZ), 9 km from the middle of the area, began a volume at 21:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 22, 2:27 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.0 hours before the alert went out and 17 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 47 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 1178 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 5:47 PM EDT, 10 minutes earlier.

Area forecast discussion, May 22, 5:47 PM EDT, 10 minutes before

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Hazardous weather outlook, May 22, 2:57 PM EDT, 3 hours before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PITTSBURGH PA
257 PM EDT WED MAY 22 2013

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021>023-041-231900-
GARRETT-TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-
JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-
FOREST-LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-
ARMSTRONG-INDIANA-WASHINGTON-GREENE-WESTMORELAND-WESTMORELAND RIDGES-
FAYETTE-FAYETTE RIDGES-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION-
MONONGALIA-PRESTON-TUCKER-
257 PM EDT WED MAY 22 2013

...SEVERE THUNDERSTORM WATCH 211 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST
CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST
PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA
AND NORTHERN PANHANDLE OF WEST VIRGINIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

FROSTY AND LOCALIZED FREEZING CONDITIONS ARE POSSIBLE FRIDAY
NIGHT...SATURDAY NIGHT...AND EVEN POSSIBLY SUNDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

07

In the hours before

Special weather statement, May 22, 4:38 PM EDT, 1 hour 19 minutes before

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Special weather statement, May 22, 5:13 PM EDT, 44 minutes before

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Special weather statement, May 22, 5:22 PM EDT, 35 minutes before

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Local storm report, May 22, 5:32 PM EDT, 25 minutes before

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Local storm report, May 22, 5:50 PM EDT, 7 minutes before

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Special weather statement, May 22, 5:52 PM EDT, 5 minutes before

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The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 21, 8:36 PM EDT	Special Weather Statement	PBZ	Washington	39 min
May 21, 8:49 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	41 min
May 22, 3:26 PM EDT	Special Weather Statement	PBZ	Greene	34 min
May 22, 4:04 PM EDT	Special Weather Statement	PBZ	Fayette	41 min
May 22, 4:38 PM EDT	Special Weather Statement	PBZ	Jefferson	37 min
May 22, 5:22 PM EDT	Special Weather Statement	PBZ	Beaver, Butler	38 min
May 22, 5:52 PM EDT	Special Weather Statement	PBZ	Washington	38 min
May 22, 6:07 PM EDT	Special Weather Statement	PBZ	Butler	53 min
May 22, 6:27 PM EDT	Special Weather Statement	PBZ	Westmoreland	48 min
May 22, 1:58 PM EDT	Special Weather Statement	PBZ	Monroe	47 min
May 22, 2:50 PM EDT	Special Weather Statement	PBZ	Marshall	40 min
May 22, 3:19 PM EDT	Special Weather Statement	PBZ	Monongalia	41 min
May 22, 5:13 PM EDT	Special Weather Statement	PBZ	Marshall	47 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2013 Severe Thunderstorm Warnings in West Virginia, 2013 Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.